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最近项目 webservice　返回表记录，应用了BinaryFormatter将DataSet转为byte[]数组，并进一步压缩后传输．明显提高了WebService数据量传输的速度．

此篇学习下　BinaryFormatter 類別

以二進位格式將物件或連接物件的整個圖形序列化和還原序列化。

转自：https://docs.microsoft.com/zh-tw/dotnet/api/system.runtime.serialization.formatters.binary.binaryformatter?view=net-5.0

using System;using System.IO;using System.Collections;using System.Runtime.Serialization.Formatters.Binary;using System.Runtime.Serialization;public class App{
       [STAThread]    static void Main()    {
           Serialize();        Deserialize();    }    static void Serialize()    {
           // Create a hashtable of values that will eventually be serialized.        Hashtable addresses = new Hashtable();        addresses.Add("Jeff", "123 Main Street, Redmond, WA 98052");        addresses.Add("Fred", "987 Pine Road, Phila., PA 19116");        addresses.Add("Mary", "PO Box 112233, Palo Alto, CA 94301");        // To serialize the hashtable and its key/value pairs,        // you must first open a stream for writing.        // In this case, use a file stream.        FileStream fs = new FileStream("DataFile.dat", FileMode.Create);        // Construct a BinaryFormatter and use it to serialize the data to the stream.        BinaryFormatter formatter = new BinaryFormatter();        try        {
               formatter.Serialize(fs, addresses);        }        catch (SerializationException e)        {
               Console.WriteLine("Failed to serialize. Reason: " + e.Message);            throw;        }        finally        {
               fs.Close();        }    }    static void Deserialize()    {
           // Declare the hashtable reference.        Hashtable addresses  = null;        // Open the file containing the data that you want to deserialize.        FileStream fs = new FileStream("DataFile.dat", FileMode.Open);        try        {
               BinaryFormatter formatter = new BinaryFormatter();            // Deserialize the hashtable from the file and            // assign the reference to the local variable.            addresses = (Hashtable) formatter.Deserialize(fs);        }        catch (SerializationException e)        {
               Console.WriteLine("Failed to deserialize. Reason: " + e.Message);            throw;        }        finally        {
               fs.Close();        }        // To prove that the table deserialized correctly,        // display the key/value pairs.        foreach (DictionaryEntry de in addresses)        {
               Console.WriteLine("{0} lives at {1}.", de.Key, de.Value);        }    }}

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